Lamp



FIG. 1 is a top/front/left-side perspective view of my new design for a lamp;

FIG. 2 is a top plan view of the lamp;

FIG. 3 is a bottom plan view of the lamp;

FIG. 4 is a front elevational view of the lamp;

FIG. 5 is a rear elevational view of the lamp;

FIG. 6 is a left side elevational view of the lamp; and,

FIG. 7 is a right side elevational view of the lamp. 

I claim the ornamental design for a lamp, as shown and described. 